Door-actuating mechanism foe



y s.EvEnsEN. 000B ACTUATING MECHANISM FOR ELEVATORS.

APPLICATION FILED IHNENA |918.

l v Patented Aug. 19, 1919.

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INVENTOR ATTORNEY THB ooLUMBlA DLANoaRAPH C0.. WAIHINmoN. D. C.'

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8. EVERSEN. v DOOR 'ACTUATING MECHANISM FOR ELEVATQRS.

APPLlcAHoN FILED wus 1a.- lsas.

m1911191 Aug. 19, 1919.

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2,6 I BY 1&4/ l i I ATTORNEY 'ma cawunu summum ed. wlsHmd-roN. n. c.

SAM EVERSEN, OF BILLINGS, MONTANA.

DOOR-ACTUATING- MECHANISM FOR ELEVATORS.

Specification of Letters Patent.

Patented Aug. 19, 1919.

Application filed .Tune 18. 1918. Serial No. 240.575.

To all whom t may concern:

Be it known that I, SAM EvERsEN, a citizen of the United States, residing at Billings, in the county of Yellowstone and State of Montana, have invented certain new and useful Improvements in Doo`r-Actuating Mechanism for Elevators, of which the following is a specification.

This invention relates to door actuating mechanism for elevators, having for its primary object to provide means of this character of simple and improved construction which operates automatically upon the asi cent or descent of the elevator car to open or close the door leading into the elevator shaft.

A further object of the invention is to provide a mechanism which is so constructed and arranged that the door in the shaft will be opened either when the car is ascending or descending and will be maintained in such position so long as the car remains stationary in the doorway. l

A further object of the invention is to provide a mechanism of the character stated which operates automatically when the car leaves the doorway to release the door to allow the same to close.

Still further and particular objects are to provide a door actuating mechanism for elevators of extremely simple construction, which may be quickly and easily applied to the elevator, which is composed of compara- K tively few simple and readily assembled parts, the various parts being so constructed and assembled as to minimize the opportunity for wear or breakage, and which will prove thoroughly reliable in practice.

With these obJects in view together with others which will appear as the description proceeds, the invention resides in the novel formation, combination and arrangement of parts, all as will be described more fully hereinafter, illustrated in the drawings and particularly pointed out in the claims.

In the drawings Figure 1 is a vertical sectional view taken through a conventional elevator shaft and car, and illustrating the' application of a door actuating mechanism constructed in accordance with the invention,

Fig. 2 is a front elevation of the car equipped with the operating apparatus,

Fig. 3 is a top plan view of the car and the apparatus,

Fig. 4 is a plan view of one of the door actuating weights, and

Fig. 5 is a detail erspejctive view of one of the tripping mem ers carried by the car.

Referring now'more particularly to the drawings, 6 indicates a car or lift of conventional construction, mounted for vertical sliding movement within the shaft and slidably arranged upon the side rails 7. This car has uprights 8 at its sides and the uprights are connected at their upper ends by the cross bar 9 to which the lifting apparatus may be attached.

One of the doors opening into the shaft for the elevator is indicated conventionally at 10 and is vertically slidable in the guideways l1 at the sides of the doorway. The door is equipped with the balance weights l2 movable vertically in suitable pockets at the sides of the doorway and connected to the door by the ropes or cables 13. It will be understood that these balance weights together are of slightly less Weight than the door itself.

The car 6 is provided near its upper end at each side with brackets indicated at 14, which support between them a shaft 15. The shaft is located substantially close to the outer face of the door 10 and is provided at each end with a pendant swinging arm 16. These arms are provided at their lower ends with weights 17 which normally hold the arms in true vertical position. Each arm near its upper end is provided with a forwardly projecting rest 18, which limits the downward swinging movement of a pawl or nger 19 hingedly connected to the upper end of the arm. `The fingers 19 normally project forwardly in horizontal direction and when the car ascends, engage the brackets or ledges 20 secured to the outer face of door 10 at the sides and near the bottom thereof. After the fingers or pawls are thus engaged, further upward movement of the car will cause the door 10 to be lifted. When the car stops opposite the doorway, the door will be held in raisedposition, and when it is desired to further ascend, the car is moved upwardly. The upper end of the door engages the upper end of its guideway and further upward movement of the door is arrested. Continued upward movement of the car will then cause the pawl 19 to swing the arm 16 rearwardly until the pawl becomes disengaged from the element 20. The weight 17 at once causes the arm 16 to swing back to normal vertical position, and the said arm is' limited against swinging to'o far forwardly by the chain 21 connecting the arm with the bracket 14:. When the elevator descends, the pawl 19 engaging the element 20 is free to move upwardly, and the. pawl therefore plays idly over the said element.

The car 6 is provided near its lower end and upon the sides thereof with a pair of relatively short stub shafts 22, upon each of which is swingingly mounted a pawl or fmger 23. The rear end of each nger is provided with a laterally disposed stem or rod 24, to which is swingingly connected the lower end of a connecting link or rod 25. The upper ends of these links are attached to stems 26 projecting laterally from the upper ends of arms 16.

The weights 12 which act as counterbalances for the elevatordoor are each equippedv -with a hinged plate 27, and these plates are arranged upon the tops of the weights so as to project forwardly beyond the same. The free ends of these plates are disposed in the path of travel of the lingers 23, and are designed to be engaged by the said fingers when the elevator is descending to cause the weights 12 to move downwardly. This movement of the weights obviously causes the door 10 to slide upwardly. When the upper end of the door 10 has reached the upper limit of its movement or 'when the weights 12 are limited against further down-- ward movement, the fingers 23 will rock upon their stub shafts 22, causing the links 25 to swing the arms 16 rearwardly and lifting the weights 17.

It is obvious from the foregoing that I have provided an apparatus which is of eX- tremely simple construction and which will positively actuate automatically when the car ascends or descends.

The foregoing description and the drawings have reference to what may be considered the preferred or approved form of my invention. It is to be understood that I may make such changes in construction and arrangement, and combination of parts, materials, dimensions, etc., as may prove eX- pedient and fall within the scope of the 'appended claims.

Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent is 1. The combination with a car and a door movable in the same direction; of a shaft on said car, a pairk of arms swingingly mounted on said shaft, weights at the lower ends of said arms, a ledge on .the .upper edge of each arm, a finger swingingly mounted upon each aim and designed normally to rest in horizontal position upon said ledges, and catch elements secured to the outer face of the door and in the path ,traversed by said fingers.

2. The combination with a car and a door movable in the same direction; of a pair of brackets upon said car, a shaft connecting said brackets, arms swingingly mounted upon said shaft at the ends thereof, weights at the lower ends of said arms, chains for limiting the swinging movement of said arms in one direction, a lledge near the upper end `of veach arm, va pawl pivoted upon each arm and resting normally upon said ledge, a catch member upon the door and lying in the path ytraversed by said pawls, fingers swingingly mounted upon said car near the lower end thereof, a link connecting each arm with the rear end of its adj acent finger, and a catchmember associated with the elevator door and lying in the path traversed by said fingers.

3. The combination with a car and a door; of pawls on said car one designed to engage the door and to open the same when the car ascends and the other designed to close the door when the car descends, a weight normally holding one of said pawls in operative position, and a link connecting the said weight with the other of said pawls.

In testimony whereof I afx my signature in presence of two witnesses.

SAEM EVERSEN.

Witnesses: f

J. B. HENDERSON, A. N. BRIGH.

copies of this patent may be obtained for five cents each, 'by addressing the Commissioner of Patents,

Washington, D. C. 

